diff options
Diffstat (limited to 'src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn.fixed')
-rw-r--r-- | src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn.fixed | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn.fixed b/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn.fixed new file mode 100644 index 000000000..bca69a976 --- /dev/null +++ b/src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn.fixed @@ -0,0 +1,37 @@ +#![allow(dead_code, unused_variables)] +// run-rustfix +// Check projection of an associated type out of a higher-ranked trait-bound +// in the context of a function signature. + +pub trait Foo<T> { + type A; + + fn get(&self, t: T) -> Self::A; +} + +fn foo2<I : for<'x> Foo<&'x isize>>( + x: <I as Foo<&isize>>::A) + //~^ ERROR cannot use the associated type of a trait with uninferred generic parameters +{ + // This case is illegal because we have to instantiate `'x`, and + // we don't know what region to instantiate it with. + // + // This could perhaps be made equivalent to the examples below, + // specifically for fn signatures. +} + +fn foo3<I : for<'x> Foo<&'x isize>>( + x: <I as Foo<&isize>>::A) +{ + // OK, in this case we spelled out the precise regions involved, though we left one of + // them anonymous. +} + +fn foo4<'a, I : for<'x> Foo<&'x isize>>( + x: <I as Foo<&'a isize>>::A) +{ + // OK, in this case we spelled out the precise regions involved. +} + + +pub fn main() {} |